Re: E85

It isn't wise to mix ANY percent of it. The stoic ratio of the fuel changes dramatically and would be WAY to lean at wide open. The calibration is not setup to detect percentages of alcohol and is set to be safe only to about 10%13% ethanol blend. Which is what you get out of the pump already.

Octane rating does go up but fuel requirements from the % go up as well, so less gas mileage.

Re: E85

Not to mention the damage that can be done by the higher alcohol % in the fuel. Not everything in the fuel system is tolerant of the higher amount of alcohol. This is why we want to stop the E15 (15% alcohol) that the fed is pressing for. Nothing but bad going higher than what you currently get out of the pump.

Re: E85 - Say NO to Alcohol

Originally Posted by HurstGN

Not to mention the damage that can be done by the higher alcohol % in the fuel. Not everything in the fuel system is tolerant of the higher amount of alcohol. This is why we want to stop the E15 (15% alcohol) that the fed is pressing for. Nothing but bad going higher than what you currently get out of the pump.

Re: E85

The 2012 CTS Performance edition will NOT run e85. You will get 10 MPG and your Check engine light will come on if it does not blow up first. You must have a yellow gas cap to run e85. Read your manual before even thinking about it.

Re: E85

We can adjust your tune for E85- we've got a few 2012 Camaro 3.6 owners running it. All fuel systems that are in the newer GM cars are E85 capable but the engines are not without a different calibration, which is why it doesn't come flex-fuel ready.

We can adjust your tune for E85- we've got a few 2012 Camaro 3.6 owners running it. All fuel systems that are in the newer GM cars are E85 capable but the engines are not without a different calibration, which is why it doesn't come flex-fuel ready.

Right, you've confirmed that for me before. My question is what is the maximum ratio of E85 to gasoline? For example, can I run half E85 and half gas without needing to alter my tune?